Alc/mixer_neon.c

   1 #include "config.h"
   2
   3 #include <arm_neon.h>
   4
   5 #include "AL/al.h"
   6 #include "AL/alc.h"
   7 #include "alMain.h"
   8 #include "alu.h"
   9 #include "hrtf.h"
  10 #include "mixer_defs.h"
  11
  12
  13 const ALfloat *Resample_lerp32_Neon(const InterpState* UNUSED(state),
  14   const ALfloat *restrict src, ALsizei frac, ALint increment,
  15   ALfloat *restrict dst, ALsizei numsamples)
  16 {
  17     const int32x4_t increment4 = vdupq_n_s32(increment*4);
  18     const float32x4_t fracOne4 = vdupq_n_f32(1.0f/FRACTIONONE);
  19     const int32x4_t fracMask4 = vdupq_n_s32(FRACTIONMASK);
  20     alignas(16) ALint pos_[4];
  21     alignas(16) ALsizei frac_[4];
  22     int32x4_t pos4;
  23     int32x4_t frac4;
  24     ALsizei i;
  25
  26     InitiatePositionArrays(frac, increment, frac_, pos_, 4);
  27
  28     frac4 = vld1q_s32(frac_);
  29     pos4 = vld1q_s32(pos_);
  30
  31     for(i = 0;numsamples-i > 3;i += 4)
  32     {
  33         const float32x4_t val1 = (float32x4_t){src[pos_[0]], src[pos_[1]], src[pos_[2]], src[pos_[3]]};
  34         const float32x4_t val2 = (float32x4_t){src[pos_[0]+1], src[pos_[1]+1], src[pos_[2]+1], src[pos_[3]+1]};
  35
  36         /* val1 + (val2-val1)*mu */
  37         const float32x4_t r0 = vsubq_f32(val2, val1);
  38         const float32x4_t mu = vmulq_f32(vcvtq_f32_s32(frac4), fracOne4);
  39         const float32x4_t out = vmlaq_f32(val1, mu, r0);
  40
  41         vst1q_f32(&dst[i], out);
  42
  43         frac4 = vaddq_s32(frac4, increment4);
  44         pos4 = vaddq_s32(pos4, vshrq_n_s32(frac4, FRACTIONBITS));
  45         frac4 = vandq_s32(frac4, fracMask4);
  46
  47         vst1q_s32(pos_, pos4);
  48     }
  49
  50     if(i < numsamples)
  51     {
  52         /* NOTE: These four elements represent the position *after* the last
  53          * four samples, so the lowest element is the next position to
  54          * resample.
  55          */
  56         ALint pos = pos_[0];
  57         frac = vgetq_lane_s32(frac4, 0);
  58         do {
  59             dst[i] = lerp(src[pos], src[pos+1], frac * (1.0f/FRACTIONONE));
  60
  61             frac += increment;
  62             pos  += frac>>FRACTIONBITS;
  63             frac &= FRACTIONMASK;
  64         } while(++i < numsamples);
  65     }
  66     return dst;
  67 }
  68
  69 const ALfloat *Resample_fir4_32_Neon(const InterpState* UNUSED(state),
  70   const ALfloat *restrict src, ALsizei frac, ALint increment,
  71   ALfloat *restrict dst, ALsizei numsamples)
  72 {
  73     const int32x4_t increment4 = vdupq_n_s32(increment*4);
  74     const int32x4_t fracMask4 = vdupq_n_s32(FRACTIONMASK);
  75     alignas(16) ALint pos_[4];
  76     alignas(16) ALsizei frac_[4];
  77     int32x4_t pos4;
  78     int32x4_t frac4;
  79     ALsizei i;
  80
  81     InitiatePositionArrays(frac, increment, frac_, pos_, 4);
  82
  83     frac4 = vld1q_s32(frac_);
  84     pos4 = vld1q_s32(pos_);
  85
  86     --src;
  87     for(i = 0;numsamples-i > 3;i += 4)
  88     {
  89         const float32x4_t val0 = vld1q_f32(&src[pos_[0]]);
  90         const float32x4_t val1 = vld1q_f32(&src[pos_[1]]);
  91         const float32x4_t val2 = vld1q_f32(&src[pos_[2]]);
  92         const float32x4_t val3 = vld1q_f32(&src[pos_[3]]);
  93         float32x4_t k0 = vld1q_f32(sinc4Tab[frac_[0]]);
  94         float32x4_t k1 = vld1q_f32(sinc4Tab[frac_[1]]);
  95         float32x4_t k2 = vld1q_f32(sinc4Tab[frac_[2]]);
  96         float32x4_t k3 = vld1q_f32(sinc4Tab[frac_[3]]);
  97         float32x4_t out;
  98
  99         k0 = vmulq_f32(k0, val0);
 100         k1 = vmulq_f32(k1, val1);
 101         k2 = vmulq_f32(k2, val2);
 102         k3 = vmulq_f32(k3, val3);
 103         k0 = vcombine_f32(vpadd_f32(vget_low_f32(k0), vget_high_f32(k0)),
 104                           vpadd_f32(vget_low_f32(k1), vget_high_f32(k1)));
 105         k2 = vcombine_f32(vpadd_f32(vget_low_f32(k2), vget_high_f32(k2)),
 106                           vpadd_f32(vget_low_f32(k3), vget_high_f32(k3)));
 107         out = vcombine_f32(vpadd_f32(vget_low_f32(k0), vget_high_f32(k0)),
 108                            vpadd_f32(vget_low_f32(k2), vget_high_f32(k2)));
 109
 110         vst1q_f32(&dst[i], out);
 111
 112         frac4 = vaddq_s32(frac4, increment4);
 113         pos4 = vaddq_s32(pos4, vshrq_n_s32(frac4, FRACTIONBITS));
 114         frac4 = vandq_s32(frac4, fracMask4);
 115
 116         vst1q_s32(pos_, pos4);
 117         vst1q_s32(frac_, frac4);
 118     }
 119
 120     if(i < numsamples)
 121     {
 122         /* NOTE: These four elements represent the position *after* the last
 123          * four samples, so the lowest element is the next position to
 124          * resample.
 125          */
 126         ALint pos = pos_[0];
 127         frac = frac_[0];
 128         do {
 129             dst[i] = resample_fir4(src[pos], src[pos+1], src[pos+2], src[pos+3], frac);
 130
 131             frac += increment;
 132             pos  += frac>>FRACTIONBITS;
 133             frac &= FRACTIONMASK;
 134         } while(++i < numsamples);
 135     }
 136     return dst;
 137 }
 138
 139 const ALfloat *Resample_bsinc32_Neon(const InterpState *state,
 140   const ALfloat *restrict src, ALsizei frac, ALint increment,
 141   ALfloat *restrict dst, ALsizei dstlen)
 142 {
 143     const float32x4_t sf4 = vdupq_n_f32(state->bsinc.sf);
 144     const ALsizei m = state->bsinc.m;
 145     const ALfloat *fil, *scd, *phd, *spd;
 146     ALsizei pi, i, j;
 147     float32x4_t r4;
 148     ALfloat pf;
 149
 150     src += state->bsinc.l;
 151     for(i = 0;i < dstlen;i++)
 152     {
 153         // Calculate the phase index and factor.
 154 #define FRAC_PHASE_BITDIFF (FRACTIONBITS-BSINC_PHASE_BITS)
 155         pi = frac >> FRAC_PHASE_BITDIFF;
 156         pf = (frac & ((1<<FRAC_PHASE_BITDIFF)-1)) * (1.0f/(1<<FRAC_PHASE_BITDIFF));
 157 #undef FRAC_PHASE_BITDIFF
 158
 159         fil = ASSUME_ALIGNED(state->bsinc.coeffs[pi].filter, 16);
 160         scd = ASSUME_ALIGNED(state->bsinc.coeffs[pi].scDelta, 16);
 161         phd = ASSUME_ALIGNED(state->bsinc.coeffs[pi].phDelta, 16);
 162         spd = ASSUME_ALIGNED(state->bsinc.coeffs[pi].spDelta, 16);
 163
 164         // Apply the scale and phase interpolated filter.
 165         r4 = vdupq_n_f32(0.0f);
 166         {
 167             const float32x4_t pf4 = vdupq_n_f32(pf);
 168             for(j = 0;j < m;j+=4)
 169             {
 170                 /* f = ((fil + sf*scd) + pf*(phd + sf*spd)) */
 171                 const float32x4_t f4 = vmlaq_f32(vmlaq_f32(vld1q_f32(&fil[j]),
 172                                                            sf4, vld1q_f32(&scd[j])),
 173                     pf4, vmlaq_f32(vld1q_f32(&phd[j]),
 174                         sf4, vld1q_f32(&spd[j])
 175                     )
 176                 );
 177                 /* r += f*src */
 178                 r4 = vmlaq_f32(r4, f4, vld1q_f32(&src[j]));
 179             }
 180         }
 181         r4 = vaddq_f32(r4, vcombine_f32(vrev64_f32(vget_high_f32(r4)),
 182                                         vrev64_f32(vget_low_f32(r4))));
 183         dst[i] = vget_lane_f32(vadd_f32(vget_low_f32(r4), vget_high_f32(r4)), 0);
 184
 185         frac += increment;
 186         src  += frac>>FRACTIONBITS;
 187         frac &= FRACTIONMASK;
 188     }
 189     return dst;
 190 }
 191
 192
 193 static inline void ApplyCoeffs(ALsizei Offset, ALfloat (*restrict Values)[2],
 194                                const ALsizei IrSize,
 195                                const ALfloat (*restrict Coeffs)[2],
 196                                ALfloat left, ALfloat right)
 197 {
 198     ALsizei c;
 199     float32x4_t leftright4;
 200     {
 201         float32x2_t leftright2 = vdup_n_f32(0.0);
 202         leftright2 = vset_lane_f32(left, leftright2, 0);
 203         leftright2 = vset_lane_f32(right, leftright2, 1);
 204         leftright4 = vcombine_f32(leftright2, leftright2);
 205     }
 206     Values = ASSUME_ALIGNED(Values, 16);
 207     Coeffs = ASSUME_ALIGNED(Coeffs, 16);
 208     for(c = 0;c < IrSize;c += 2)
 209     {
 210         const ALsizei o0 = (Offset+c)&HRIR_MASK;
 211         const ALsizei o1 = (o0+1)&HRIR_MASK;
 212         float32x4_t vals = vcombine_f32(vld1_f32((float32_t*)&Values[o0][0]),
 213                                         vld1_f32((float32_t*)&Values[o1][0]));
 214         float32x4_t coefs = vld1q_f32((float32_t*)&Coeffs[c][0]);
 215
 216         vals = vmlaq_f32(vals, coefs, leftright4);
 217
 218         vst1_f32((float32_t*)&Values[o0][0], vget_low_f32(vals));
 219         vst1_f32((float32_t*)&Values[o1][0], vget_high_f32(vals));
 220     }
 221 }
 222
 223 #define MixHrtf MixHrtf_Neon
 224 #define MixHrtfBlend MixHrtfBlend_Neon
 225 #define MixDirectHrtf MixDirectHrtf_Neon
 226 #include "mixer_inc.c"
 227 #undef MixHrtf
 228
 229
 230 void Mix_Neon(const ALfloat *data, ALsizei OutChans, ALfloat (*restrict OutBuffer)[BUFFERSIZE],
 231               ALfloat *CurrentGains, const ALfloat *TargetGains, ALsizei Counter, ALsizei OutPos,
 232               ALsizei BufferSize)
 233 {
 234     ALfloat gain, delta, step;
 235     float32x4_t gain4;
 236     ALsizei c;
 237
 238     data = ASSUME_ALIGNED(data, 16);
 239     OutBuffer = ASSUME_ALIGNED(OutBuffer, 16);
 240
 241     delta = (Counter > 0) ? 1.0f/(ALfloat)Counter : 0.0f;
 242
 243     for(c = 0;c < OutChans;c++)
 244     {
 245         ALsizei pos = 0;
 246         gain = CurrentGains[c];
 247         step = (TargetGains[c] - gain) * delta;
 248         if(fabsf(step) > FLT_EPSILON)
 249         {
 250             ALsizei minsize = mini(BufferSize, Counter);
 251             /* Mix with applying gain steps in aligned multiples of 4. */
 252             if(minsize-pos > 3)
 253             {
 254                 float32x4_t step4;
 255                 gain4 = vsetq_lane_f32(gain, gain4, 0);
 256                 gain4 = vsetq_lane_f32(gain + step, gain4, 1);
 257                 gain4 = vsetq_lane_f32(gain + step + step, gain4, 2);
 258                 gain4 = vsetq_lane_f32(gain + step + step + step, gain4, 3);
 259                 step4 = vdupq_n_f32(step + step + step + step);
 260                 do {
 261                     const float32x4_t val4 = vld1q_f32(&data[pos]);
 262                     float32x4_t dry4 = vld1q_f32(&OutBuffer[c][OutPos+pos]);
 263                     dry4 = vmlaq_f32(dry4, val4, gain4);
 264                     gain4 = vaddq_f32(gain4, step4);
 265                     vst1q_f32(&OutBuffer[c][OutPos+pos], dry4);
 266                     pos += 4;
 267                 } while(minsize-pos > 3);
 268                 /* NOTE: gain4 now represents the next four gains after the
 269                  * last four mixed samples, so the lowest element represents
 270                  * the next gain to apply.
 271                  */
 272                 gain = vgetq_lane_f32(gain4, 0);
 273             }
 274             /* Mix with applying left over gain steps that aren't aligned multiples of 4. */
 275             for(;pos < minsize;pos++)
 276             {
 277                 OutBuffer[c][OutPos+pos] += data[pos]*gain;
 278                 gain += step;
 279             }
 280             if(pos == Counter)
 281                 gain = TargetGains[c];
 282             CurrentGains[c] = gain;
 283
 284             /* Mix until pos is aligned with 4 or the mix is done. */
 285             minsize = mini(BufferSize, (pos+3)&~3);
 286             for(;pos < minsize;pos++)
 287                 OutBuffer[c][OutPos+pos] += data[pos]*gain;
 288         }
 289
 290         if(!(fabsf(gain) > GAIN_SILENCE_THRESHOLD))
 291             continue;
 292         gain4 = vdupq_n_f32(gain);
 293         for(;BufferSize-pos > 3;pos += 4)
 294         {
 295             const float32x4_t val4 = vld1q_f32(&data[pos]);
 296             float32x4_t dry4 = vld1q_f32(&OutBuffer[c][OutPos+pos]);
 297             dry4 = vmlaq_f32(dry4, val4, gain4);
 298             vst1q_f32(&OutBuffer[c][OutPos+pos], dry4);
 299         }
 300         for(;pos < BufferSize;pos++)
 301             OutBuffer[c][OutPos+pos] += data[pos]*gain;
 302     }
 303 }
 304
 305 void MixRow_Neon(ALfloat *OutBuffer, const ALfloat *Gains, const ALfloat (*restrict data)[BUFFERSIZE], ALsizei InChans, ALsizei InPos, ALsizei BufferSize)
 306 {
 307     float32x4_t gain4;
 308     ALsizei c;
 309
 310     data = ASSUME_ALIGNED(data, 16);
 311     OutBuffer = ASSUME_ALIGNED(OutBuffer, 16);
 312
 313     for(c = 0;c < InChans;c++)
 314     {
 315         ALsizei pos = 0;
 316         ALfloat gain = Gains[c];
 317         if(!(fabsf(gain) > GAIN_SILENCE_THRESHOLD))
 318             continue;
 319
 320         gain4 = vdupq_n_f32(gain);
 321         for(;BufferSize-pos > 3;pos += 4)
 322         {
 323             const float32x4_t val4 = vld1q_f32(&data[c][InPos+pos]);
 324             float32x4_t dry4 = vld1q_f32(&OutBuffer[pos]);
 325             dry4 = vmlaq_f32(dry4, val4, gain4);
 326             vst1q_f32(&OutBuffer[pos], dry4);
 327         }
 328         for(;pos < BufferSize;pos++)
 329             OutBuffer[pos] += data[c][InPos+pos]*gain;
 330     }
 331 }